Milling tool, in particular hand milling machine for milling bevels

Abstract

The milling tool ( 1 ) has a spindle ( 2, 3 ), which is mounted in a housing ( 8 ) and carries a milling head (14) fitted with cutting inserts ( 15 ). Arranged in the drive train of the milling head ( 14 ) is a torque-transmitting resilient coupling ( 13 ). The spindle ( 2, 3 ) actually comprises spindle parts ( 2, 3 ) that are connected by a plug-in connection via a bearing bush ( 9, 10 ) and can be turned with respect to each other, and the coupling ( 13 ) is arranged between these spindle parts. The resilient coupling comprises a helical spring ( 13 ) that is fastened by each of its ends to a spindle part ( 2, 3 ). The milling head ( 14 ) is fitted with sharp-edged cutting inserts ( 15 ), which have a wedge angle of 40-75° and have on the milling head ( 14 ) a position in which they operate with a positive rake angle of at least 6° and a clearance angle of at least 6°.

1 . A milling tool ( 1 ), especially of a hand milling machine for milling bevels, with a spindle ( 2 ,  3 ) supported in a case ( 8 ), said spindle carrying a milling head ( 14 ) fitted with cutting tips ( 15 ), and, in addition, especially with a guide stop ( 33  or  41 ) to be placed against the workpiece, and possibly with an additional guide stop ( 41  or  33 ) to be placed against the workpiece, said additional guide stop ( 41  or  33 ) being perpendicular to the first guide stop ( 33  or  41 ), wherein an elastic coupling ( 13 ) that transmits the torque is mounted in the drive train of the milling head ( 14 ). 
   
   
       2 . A milling tool in accordance with  claim 1 , wherein the spindle ( 2 ,  3 ) consists of spindle parts ( 2 ,  3 ) that can rotate relative to each other and where the coupling ( 13 ) is disposed between them. 
   
   
       3 . A milling tool in accordance with  claim 2 , wherein the spindle parts ( 2 ,  3 ) are put together by a plug connection, in which they are flexurally rigid and can rotate relative to each other. 
   
   
       4 . A milling tool in accordance with  claim 3 , wherein the spindle parts ( 2 ,  3 ) are connected in the plug connection by bearing bushes ( 9  and  10 ). 
   
   
       5 . A milling tool in accordance with  claim 3 , wherein, in addition to pivot bearings ( 4 ,  6 ) installed near the ends of the spindle, the spindle has another pivot bearing ( 5 ) in the vicinity of the plug connection. 
   
   
       6 . A milling tool in accordance with  claim 2 , wherein at least the spindle part ( 2 ,  3 ) that supports the milling head ( 14 ) is supported in the case ( 8 ) near its two ends. 
   
   
       7 . A milling tool in accordance with  claim 1 , wherein the elastic coupling consists of a helical spring ( 13 ) with its ends mounted on one spindle part ( 2 ,  3 ) each. 
   
   
       8 . A milling tool in accordance with  claim 7 , wherein the ends of the spring are each clamped and/or adhesively bonded, soldered, or welded in a socket, which is formed in a nut ( 12 ) screwed onto the spindle part ( 2 ,  3 ). 
   
   
       9 . A milling tool, especially of a hand milling machine for milling bevels, with a spindle ( 2 ,  3 ) supported in a case ( 8 ), said spindle carrying a milling head ( 14 ) fitted with cutting tips ( 15 ), and, in addition, especially with a guide stop ( 33  or  41 ) to be placed against the workpiece, and possibly with an additional guide stop ( 41  or  33 ) to be placed against the workpiece, said additional guide stop ( 41  or  33 ) being perpendicular to the first guide stop ( 33  or  41 ), wherein the milling tool ( 1 ) has an elastically operating drive, preferably a drive that has a control mechanism that cushions the driving force. 
   
   
       10 . A milling tool of a hand milling machine for milling bevels, with a spindle supported in a case, said spindle carrying a milling head fitted with cutting tips, and, in addition, especially with a guide stop ( 33  or  41 ) to be placed against the workpiece, and possibly with an additional guide stop ( 41  or  33 ) to be placed against the workpiece, said additional guide stop ( 41  or  33 ) being perpendicular to the first guide stop ( 33  or  41 ), wherein a flexible shaft is mounted in the drive train. 
   
   
       11 . A milling tool in accordance with  claim 1 , comprising the fitting of the milling head ( 14 ) with sharp-edged cutting tips ( 15 ), which have a wedge angle of 40-75° and preferably have a position on the milling head in which they operate with a positive rake angle of at least 5° and a clearance angle of at least 6°.